Mold-form construction



"Dec. 9, 1930. D. BIERHAALDER 1,734,329

MOLD FORM CONSTRUCTION Filed June 30, 1928 2 Sheets-Sheet l H 0 v 0 H II [/lf [7% 57v l/a 24 Id De 9, 1930. D. BIERHAALDER 1,784,329

MOLD FORM CONSTRUCTION Filed June 50, 1928 2 Sheets-Sheet 2 line 44 of Fig. 8, as is indicated by the ar- Patented Dec. 9, 1930 unirso STATES PATENT. OFFICE,

DIRK BIERHAALDER, MINNEAPOLIS, MINNESOTA, ASSIGNOR T EDNA MAY BIERHAALDER, OI MINNEAPOLIS, MINNESOTA MOLD-FORM CONSTRUCTION Application filed June 30,

' 1 forms to save labor and expense in the construction of forms.

A further object is to provide a wall form construction, wherein the spreader and tie bars are used which will eliminate the necessity for using any studding at one. side of the wall, and will eliminate the necessity for using more than one-half the usual number of studs at the other side of the wall.

To these ends, the invention consists in the novel parts and novel combinations of parts hereinafter defined in the claims, and described in the following specification, made in connection with the accompanying drawings, wherein like reference characters refer to thesame or similar parts throughout th various views and, in which, l

Fig. 1 is a perspective view illustrating an embodiment of the spreader and tie bar of the present invention;

Fig. 2 is a perspective view illustrating a wall :torm with a .concrete wall poured therein, the wall form being constructed in ac cordance with the present invention;

Fig. 3 is a vertical section taken substan- 7113 tially through the wall form on the line 3-3 of 2, as is indicated by the arrows, before the concrete wall has been poured therein;

Fig. 4 is a horizontal section taken on the rows;

Fig. 5 is a verticalsection through the wall form illustrated in Fig. 2, taken substantially on the line 55 of'Fig. 2, as is indicated by the arrows, the section being taken before the concrete wall has been poured;

Fig. 6 is a horizontal section taken substantially on the line 6-6 of Fig. 5, as is indicated by the arrows;

1928. Serial No. 289,393.

Fig. 7 is a view in side elevation of a portion of the wall form shown in Fig. 2;

Fig. 8 is a vertical section taken through a concrete wall, constructed by the use of the form of the present invention and illustrating a brick wall tied to the concrete wall;

Fig. 9is a horizontal. section taken on the line 9-9 of Fig. 8, as is indicated by the arrows, and

Fig. 10 is. a view in side elevation illustrat- 5 ing a sli htly modified form of spacing and tie bar For use in the construction of wide walls.

Referring to the drawings, a spreading and tie bar 11 is illustrated. The bar 11 is formed from long, narrow, thin, gauge sheet material and is provided adjacent its central portion with a down turned flange 11a which isot' the same length as the thickness of a concrete Wall to be formed. The two ends of the flange 11a formshoulders 11?) and spaced outwardly from the shoulders 116 a distance slightly less than the thickness of the mold boards. to be used in constructing a mold form, pin openings 110 are provided. Spaced outwardly from the shoulders 11?) at each end of the bar 11 a distance equal to approximately one-half the thickness of the form boards to be used, are the small nail openings 1 1161. At the left end of the bar, as viewed in Fig. 1, there is provided a second pin opening 11@ and this opening is spaced outwardly from the left shoulder 116 a distance slightly less than the thickness of two mold boards. At the right end of the bar, as viewed in Fig. 1, is a 'rod opening 117 andthis rod opening is spaced outwardly from the right shoulder 11?) a distance approximate to one-half the thickness of a mold board to be used. Toward the left end of the bar, there is a wing 11g struck upwardly from the bar 11 and this wing forms a shoulder which, for conveniencewill' also be designated 11g, and'is spaced inwardly from the left end of the bar a distance equal to the inward spacing of the left shoulder 11?). r The wing 119 is bent upwardly towards the rear side of the bar, as viewed in Fig. 1, so that it will extend longitudinally of the bar and in spaced relationship transversely of the bar respective nto the left 'shoulderllh, Adjacent the central portion of the bar, as viewed in Fig. 1, there are opposlng upstruck wings 11k and the general plane of these wings 1s transverse to'the length of the bar. In Fig. 10,:1- bar 12 is "illustratedrwhich is constructed exactly like the bar 11 with the"exceptionl that in- J stead of but a single pair of wingsnpstruck frointhe center of the bar, the bar12 has ,threepair fof upstruclr'wings 12h, oneyot which is arranged centrally on the bar and "the other two of which are spaced'longi tudinally respective to the central wings'12h." The bar construction. illustrated in Fig.

is used where quitethick walls are desired within which ainurnber of: reinforcing rbds mustbe inibeddeditzbecomes' desirable a5 mm a mold. form-for a concrete wall,.studs.need

heused at but one side of thezwalliand these 'studszmay be spaced apart sesame. twice as, great as studs are now. commonly spaced f .in ,wall form.- constructions. "Referring to Fig.2,a form wall and poured concrete wall -arei illustrated', constructedaccordi' (r to 'vthe present invention. Thestudsmay o course, be placed onieitherside of the wallbut'in the illustration they are shown on theouter 1 sides of the wall. 'l Inibuildin'g the forms, vertical studs 13 are first, erected? and "form board 14, which is half thewidthof the-form boards 15' used in the; general constructionof "the walLis nailed to the studs 13,- so that the width oft-he boar'd l l extends vertically. A 1 second form board16 corresponding in width 'to the formvjboard 14 is then laid, and this board 16. is spaced, inwardly from the L board j 14 4 a distance equal to the desired thickness fofthe plurality 'ofspreader and tie bars 11 will then be plaeed'across the two "boards 14- and 165 at spaced intervals longitudinally of the boardsl i and l6. The spreader and tiei bars 11 will be,so; positioned that thev right ends. of the bars, as illustrated; in Fig.- 1, will project outwardly and the left ends of the bars-willprojeet inwardly. The ends of. the bars will rest. di-

,rectly on the upper edges of;- the two boards 14 and :16, and the fiange'l'la will :projeet downwardly from ,the upper edges of the board so that the; shoulders I 1 1 b; wi] l abut the innerj'sides of the-twoboards-14 and 16, to holdftheqsame in spaced relationship. To .mztintainthe' spreader bars, andthe boards 14 and 16 in proper assembled relationuntil oupper forn boards are laid, small nails, .such "as shingle nails, will be pounded into the upperedges of the two boards 14 and 16 through-the small nail holes 1161 in certain serted in the. pin holes 110.

amold board 18.*which'issimi1ar a an respects to the board 17." 'The shoulders 11g ofthespreader and tie bars will abut the board 18' at'its inner side, so as to maintain the proper spaced relationship between the 'twdboards17'and 18. Pins '19 are now provided and thesepins are preferably of a length approximately equal to the width of the boards 15,17 and 18 At their central portions, they are pinched outwardly slightly'toform projecting tits 19a. The pins 19 are inserted through the pin. openings. 110 at the two ends of the spreader bars. 'The lower ends of the pins are partially pointed and are rounded at their extreme lower ends and due to the fact that the openings 11c are spaced outwardly from the-boards 11b of the spreader bars a. distance slightly less thanthe thicknessof the various form boards used; the lower ends. ofthe pins will first have tobe engaged in. the openin 11c lwhereuponthe pins will'have to be riveri downwardlyruntil thetits 19a strike the upper sides-of the spreader bars, toprevent further downward movement of the pins rev spective thereto. The pins19 will, there? ins 14 andj16' andwill project upwardly sub- :stantiallyhalfwav across the boards 17 and -1 8. Aboveftheiboards 17 and 18, the form .boards15. will be placed, the lower edge of onelrform -boaril resting 'onthe upper edge of the other *forrn board in the immediate =lower-course. Above each pair ofo opposing bpardslfi in a horizontal course, there will be placed the spreader and tie bars 11, and as the wall is built up,the pins 19 will beini I The shoulders 11?) and 11g, together with-the studs 13, will hold the boards 15 in proper spaced arrange .Inent andthe pins 19 will tie the two walls of the ,mold form together, and will press the form boards Q15 tightly against the various shoulders. f In v constructing, the wall, the spreader and tie bars 11 will be placed in vertieal alinement at spaced intervals longitudinally of the ;wall.} Accordingly, [as the tore, torcethe boards '14. 16. 17 and18 under pressure against the shoulders *llb and the shoulders Y 11gofth'e bars '11.. As the 1519 are. ofa lengthequal to the entire w dth of one of the boards 15, the pins will'project downwardly substantially across the boards 7 Inold form for the'wall is built up, the pins :19 will befvertically'alined throughout the wall and i {will form [practically continuous studs at both, theinner and outer sides of the .wall. The wall form can thus be built by approximately one-fourth the usual number of studs 'reduired. 1

' "If at theside ofthe wall form where studs are not used, one of the form boards, such as theboard 20 should terminate short of the end of the wall, a second form board 21 will "be used and the two boards 20 and 21 will be placed, so that their two ends abuteach other.

, the left wing of Fig. 2, a short spanning board 22 would beused by the carpenter laying up the wallandthis board would be so placed that it would-span the twojoining ends of the boards 20 and 21, and the spanning boards 22 used would be of a width corresponding to the width of the boards 21 and 22, so that it would extend between the 11 above and below the board 20 or 21 most closely ad acent the ointure. Small blocks 23 would be nailed to the form boards immediately above and below the boards 20 and 21,

and theseblooks would be so placed as to abut the ends'of the bars 11 recen ly above specified. A special type of pin 24 could be used for securing the spanning board 22 in plrce. "The pm 24, as illustrated in the drawings, is

of approximately twice the length of the width or" the form board 15 and has a pinched portion forming a projecting tit 24o fourth of the distance downwardly from its upper end. The pin 24 would be inserted through the pin opening 116 in the spreader bar 11 immediatelyabove the spanning board 22, and the pin would be pounded downwardly and its lower end would be engaged in the pin opening 116 in the spreader bar immediately below'the spanning board 2 1', whereupon the pin would "e furtherpounded downwardly until the tit 24a strucl: tie upper side of the upper spreader bar 1.1. The pin 24: would force the spanning board 22 and the joining ends of the two boards 29 and 21 inwardly to maintain the proper spaced relationship between the inner and outer walls or" the wall form and to cause one of the boards 20 or 21 to abut the shoulcers 11o and'llg of the-spreader bare.

it the jointure between the two boards 20 and 21 should fall approximately midway between two rows of the bars 11, as shown on the right wing of Fig.2,a spreaderboa-rd 25 is used andthisboardis of h greater than the'spacing between two rows of cars 11. The

nw tsrd board .25. With this construction, the joining ends of the two boards 20 and 21 will be maintained in proper spaced relationship relative to the opposing board on the outer wall of the form, and yet no studding need necessarily be used on the inner wall of the form.

Instead ofusing the long pins 24 in con nection with the spanning boards 22 and 25, two short pins 19 could be used if desired. The use of the spanning boards 22 and 25 will not interrupt the continuous stud arrangement formed by the pins 19, inasmuch as whether the pins 19 are used or whether the pins 2 1 are used, the pins will extend across practically the whole width of the form boards used. The various pins' 19 and 24, accordingly,e2;tend practically continuously throughout'the entire height of the wall forms and bear against practically all portions of every board used in the form walls. Knotted or cracked boards can thus be properly tied into the wall.

rt the upper edge of the wall form, a

slightly different construction is used than in e main body of the wall form. Instead of using the short pins 19, in connection with the two uppermost courses of bars 11, long pins 2 1 are used, and these pins are inserted through the pin openings 110 at both the inner and outer sides of the wall form of the alined uppermost bars 11 and the bars 11 immediately below the same, so that the pins 24 b dge the uppermost boards 15 in the form. Vihth this construction, therewill be no danger that the pins will slip or turn inwardly to permit the uppermost boards to spread apart as would bethe case if the short pins 19 were used. I i

- if it is desired to use horizontal reinforcing rods in the wall: to be poured, the central wings llhot' the spreader and tie bars together with the upper surfaces of the tie bars form proper seats for holding the reinforcing rods. As illustrated in the drawings, horizontal;reinforcing rods 26 are used and as the various horizontalcourses in the wall form are built, these rods 26 will be laid on the bars 11 so that they rest between the opposing wings llh of the bars. 1

it 1t- 15 desirable to construct one slde of the wall form first as, for example the outer side, the right ends 01 the bars 11 may be inserted between the various edges of the boards as they are laid one on top of each ther and nailed to the studs 13. The pins 9 may be inserted in the pin holes 110 at the 'glit end of the bars 11, in the usual man- -er. When it becomes desirable to construct he inner wall of the mold form, all the bars 1 may be swung upwardly so as to be out or the way 01": the workmen by bending the same upwardly from the right shoulder 11?), as illustrated in Fig. 1. As the boards in the inner wall are laid, the various bars adapted to extend between adjacent verticalficoursesin the wall," will be swung downwardly to Cause the ri ht shoulders 11b of the'bars, as 'viewed in 1, toabutthe inner sides of the boards of the outerwall-and tocause the left-shoulders 117) to abuttheinner sides of the boards'of the inner wall. The inner ends .Ofrtll bars will be secured, as usual,'by

means'ofthe pins 19, and 24. T It will be seen that the workmen can readily construct. the

wall forms in thismanner, and thebars secured in the outer walls'will not be in the way of the work "on the innerwalls.

. The spreader and tie bars can also be in serted between form walls which are already er'ected,due to the fact that there are no upwardly extending or downwardly extendflanges orobstructions at the ends of the bars; which will preventthe bars from being turned, as they areinserted between the edges 7 of adjacent: boards. The bars, accordingly,

be used inbeam forms where the sides of the forms areconstructed from panels or the like. Also in wall forms, aftertheforms are built, certain spreaderan'd tie bars/11 may be inserted, 'f necessary, atv weak points in the form construction.

. :After the'wall form has been made, the

concret'ecan be poured to form a poured concrete wall 27, as is illustrated in Figs. 2, 8 and 9. As the concrete ispoured into the form, the central .wing openings'in'the bars 5 11 will permit any air'or water beneath the spreader and tie barsto run upwardly, thereby preventing air pockets in the wall and causing bars 11 to be tightly and firmly imbedded in the con'crete'wall. When the wall is formed, the forms can be readily wrecked by removal of the pins .19 and 24.

dueto the fact that but very few studsare' The form boards will be practically free of nails-andmavbe very easily removed. Also used in the construction of the forms, the

time necessary to wreck the wall will be much less than the time required to wreck a wall of common standard construction. Also 1111* preparing, the mold boards for'further use,

a great deal oftime will be saved inasmuch as but fewj nailswill have to be removed from the boards. The present construction isparticularly advantageous'where it is desired to pour vai flooring of concrete above the concrete wall. In order to tie the flooring prop:

erlyto the wall, when the wall is poured, a

space in the wall forms adjacent its top is permitted to remain free of concrete. When the flooringispoured, the unpoured space at ing all the formboards in place andpreventing their use elsewhere. With the present construction, the upper two or three courses of the wall form may retained in. position untilthe flooring above the concrete wall is poured, and yeti the pins'19 and 24 may be torelease the lower form boards and permit their use elsewhere. The studs at the outer .side of thewall'can be removed before the flooring is oured. A greatsaving in the removed fromthe lower portion of the wall,

number of orm boards required in the construction of a building will thus result from useof thepresent construction. q I

After the form boards'and pins have/been removed from the wall 27, theIprojecting ends of the bars 11 may be clipped off close to the wallif, desired. Thefbars 11 .will then act pto strengthen the concrete wall and if reinforcing rods 26 are used,the bars 11 will act to. tie the concrete at all portions of the wall to the reinforcing rods. 7 l

' If it is desired to erect a brick wall .at the outer sideofthe concrete wall 27, vertical reinforcing rods 28 willbe provided and these rods will be run downwardly through the reinforcing rod holes llfin the vertically alined bars '11. The'brick wall 29 may then be built up at the'outer side of the/concrete wall-27 and spaced slightly outwardly therefrom, in the usual manner. As the brick vwall is constructed, the samemay be tied to the concrete wallat various points by means of the brick tie rods 30. These tie rods each have a hook shaped inner end adapted to fit f above the vertical reinforcing rods 28,;md Y

the outer ends of the brick tie rodsare suitably bent" or shaped to tie into the plaster used between the successive courses of bricks.

Due to thefact that the .tie rods 30 may be hooked over the vertical reinforcing rods 28 at any desired. height of the concrete, wall,

the brick wall 29 may be tied into the concrete wall at any desired point. The, brick ties, accordingly, need; not be molded into the concrete wall at'certain fixed points as is the case with'the usual type of brickrtie construction. Also vertical adjustment of the ties can be made'without, in any manner, weakening the concrete wall, asby grooves orv similar construction. I

The angleconstruction of the central pore tion of the reinforcing and tie bar 11 will pre vent thebar from bending, while the Wall is being built, even though concrete be poured into the wall format a considerable height, and when the wall is built, the angle construe tion will efliciently tie the bar to the concrete structure of the wall. It will be understood ,that' the inventordoesnot wish to limit him} self to a spreader and tie bar having only a single pair of wings 11h at-thecentral portion thereof for holding reinforcing rods. If

desired, bars such as the bars 12 having a plurality of upstruck wings at the central inforcing rods, may be substituted for the bar 11. The spreader and tie bar may be used in practically any type of form mold construction, whether the molds are used for walls, beams, columns, pilasters, jambs, etc. Wherever the bars are used, a great saving in labor and in mold material will result. It will, of course, be understood that any desired type of key or pin may be substituted for the pins 19'and :24, and thatsuitable openings may be substituted for the openings 110 and 116 in the bars 11 to accommodate the particular type of key or pin used.

The device has been demonstrated in actual practice and has been found to be very successful for the purposes intended. The length of the bar will, of course, be varied for walls of different thicknesses.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the various parts without departing from the scope of the present invention.

WVhat is claimed is:

1. A wall mold form construction having in combination, a plurality of boards laid edge on edge to form spaced form walls, the ends of certain boards being laid to abut the ends of certain other boards, short boards spanning the abutting ends of adj acentboards at the outer sides thereof, and a plurality of spacing and tie bars inserted to extend transversely of the form walls and between the edges of opposing form boards and projecting outwardly therefrom, said bars having shoulders inwardly from the form boards adapted to abut the inner sides thereof, and having openings adjacent their ends which extend outwardly from the form boards and also having openings adapted to extend outwardly from the spanning boards, and members inserted through certain of said first mentioned openings and bearing against the outer sides of said form boards and members inserted through certain of said last mentioned openings and bearing against said spanning boards, said first and last mentioned members pressing said form boards inwardly towards said shoulders.

2. A wall mold form construction having in combination a plurality of mold boards laid edge on edge to form spaced parallel form walls, the ends of certain boards in the various horizontal courses in the form walls being laid to abut the ends of certain other boards therein, short boards spanning the abutting ends of adjacent boards on the outer sides thereof, spacing and tie bars extending transversely between the form walls and extending between the edges of adjacent horizontal courses, said spacing and tie bars having shoulders thereon abutting the inner sides of the boards of the form walls and having openings therethrough adjacent their ends spaced from said shoulders a distance slightly less than the width of the form boards, mem-v bers projecting through said openings and; adapted to bear against the outer sides of the form boardsto press the same tightly against said shoulders, each spacing'bar ad acent one end having an opening projecting therethrough; spaced. outwardly from, an; inner shoulder .avdistance slightly less than the width ofa; form board plus the width of a s annin uboard and members ro'ectin 7 through said lastmentioned openings outwardly from spanningboards to bear against the outer sides thereof and force the same inwardly. l1 i I V j 3, A wal mold form construction having in combination a plurality of boards laid edge onedge to form, spaced form walls,the ends of certain ,boards being laid to abut the ends ofcertain other boards, boards spanningthe abutting ends of adjacent boards at the outersides thereoha plurality of horizontal lygspaced and vertically alined spacing and tie barsyextending transversely between the' form walls and projecting outwardly between the edges ofadjacent boards, said bars having shoulders inwardly. spaced from their-ends and abutting the inner sides of the form walls, and havingaopenings there-' in outwardly spaced from said shoulders, members inserted within 'said openings except where spanning boards are used, said members bearing against the outer sides of said form walls to force the same against said shoulders, said bars above and below said spanning bars having openings outwardly therefrom, and members fitting through the last mentioned openings in bars above and below spanning boards and extending across the spanning boards to force the same inwardly, said first mentioned and last mentioned members forming practically continuous Vertical studs for said form walls.

4. A spacing and tie bar having shoulders inwardly spaced from its ends adapted to bear against the inner sides of opposite boards in the two walls of a concrete mold form, said bar outwardly from said shoulders having portions adapted to extend out wardly between the edges of form boards, said portions having openings therein spaced outwardly from said shoulders a distance approximating the thickness of form boards and one of said portions having therein an opening spaced outwardly from'its adjacent shoulder a distance approximating the thickness of a form board plus the thickness of a board adapted to be used to span abutting ends of the form board, members adapted to be inserted within said first mentioned openings to bear against the outer sides of form boards and adapted to be inserted within said last mentioned opening to bear against a spanning board.

5. A spacingcand tie bar for concrete mold f forms and the like having downwardly jecting 'shoulders adjacent but spaced 'i om]. the twoendsjof the bar, anupwardly projecting shoulder spaced from one end of the bar the samedistance as one of said downwendly projecting "shouldais; said bar'having open 4 'ingsfedjacentethe ends-thereof spaced outmny -irom-- said shoulders slightly less distances than the width of form boards, where'- m by said bar can be placed to extend trensversely between the two walls of a, mold form with'the outer ends of the bar projecting outwerdly between the edges of adjacent boards of the form" and the downwardly projecting uishoulders bearing against the inner sides of the opposite boards" of the formbelow the bar and the upwardly projecting shoulder beeringegeinst the inner side of 'a. form board above the bar, wedging members insertable h 2o in the openings of sand bar to bear against the outer'sides ofform boards'and force the same i tightly eg aixist said shoulders, and wvertical holei'n at least one end ofsaid bar; said hole being located substantially midway between i 26 the correspondin shoulder and opening at that endof'the trier-the purposeof receiving a nail orthe'like tobe'driven into the horizontal surface'of the adjacentform board during'the assembling operation;

39 In testimony whereof I'afiix mysi ature.

' DIRK BIERHAAL ER. 

